See also:

Power Door Locks
(Unlock): Press to unlock the doors. (Lock): Press to lock the doors. See “Power Door Locks” in Vehicle Personalization . ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...

Power Door Locks
Power Door Locks (Unlock): Press to unlock all doors. (Lock): Press to lock all doors. See “Power Door Locks” in Vehicle Personalization. ...